Do you have an estimated date when you will make the emerald singles available for sale?
To attempt to better answer your question, Rmc, the Hydra release came down to the final month of 2018 - and after weeks of pushing my limits I burned myself out. All coins have been assembled since late last year, but the few that remain still need to go into their housings. Cleaning & grading the parts I receive and discarding many is probably the most tedious part of what I do, even with occasional help. This has always been a struggle.
While my site lists the Hydra as sold out, I do have roughly 20 or so diamond hydras and 20 emerald hydras left - all with serials above 125. This is also assuming I have enough A-quality retaining rings in stock, as more than 50% of the pieces I last ordered have been graded B, C, etc. and are unusable. It would also be easiest for me to sell them as sets, but I will most likely sell them individually as I've mentioned - as this would likely benefit a higher number of my customers. I will also likely limit sales to one of each per shipping address - more work and shipping expense for me, but at a manageable quantity.
I am working for these to become available to you and others as soon as possible.
Many thanks,
Max-